package com.nj.liandi.gulimall.search.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.nj.liandi.common.to.es.SkuEsModel;
import com.nj.liandi.common.utils.R;
import com.nj.liandi.gulimall.search.config.ElasticSearchConfig;
import com.nj.liandi.gulimall.search.constant.EsConstant;
import com.nj.liandi.gulimall.search.feign.ProductFeignService;
import com.nj.liandi.gulimall.search.service.MallSearchService;
import com.nj.liandi.gulimall.search.vo.AttrResponseVo;
import com.nj.liandi.gulimall.search.vo.BrandVo;
import com.nj.liandi.gulimall.search.vo.SearchParam;
import com.nj.liandi.gulimall.search.vo.SearchResult;
import org.apache.commons.lang.StringUtils;
import org.apache.lucene.search.join.ScoreMode;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.index.query.BoolQueryBuilder;
import org.elasticsearch.index.query.NestedQueryBuilder;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.RangeQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.SearchHits;
import org.elasticsearch.search.aggregations.Aggregation;
import org.elasticsearch.search.aggregations.AggregationBuilders;
import org.elasticsearch.search.aggregations.bucket.nested.NestedAggregationBuilder;
import org.elasticsearch.search.aggregations.bucket.nested.ParsedNested;
import org.elasticsearch.search.aggregations.bucket.terms.ParsedLongTerms;
import org.elasticsearch.search.aggregations.bucket.terms.ParsedStringTerms;
import org.elasticsearch.search.aggregations.bucket.terms.Terms;
import org.elasticsearch.search.aggregations.bucket.terms.TermsAggregationBuilder;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.elasticsearch.search.sort.SortOrder;
import org.mockito.internal.util.StringUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.swing.text.Highlighter;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

@Service
public class MallSearchServiceImpl implements MallSearchService {

    @Autowired
    private RestHighLevelClient client;

    @Autowired
    ProductFeignService productFeignService;

    @Override
    public SearchResult search(SearchParam param) {
        SearchResult result = null;

        SearchRequest search = buildSearchRequest(param);

        try {
            SearchResponse response = client.search(search, ElasticSearchConfig.COMMON_OPTIONS);
            result=buildSearchResult(response,param);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    private SearchResult buildSearchResult(SearchResponse response,SearchParam param) {
        SearchResult result = new SearchResult();
        //返回所有查到的商品
        List<SkuEsModel> esModels = new ArrayList<>();
        SearchHits hits = response.getHits();
        if (hits.getHits()!=null&&hits.getHits().length>0) {
            for (SearchHit hit : hits.getHits()) {
                String sourceAsString = hit.getSourceAsString();
                SkuEsModel esModel = JSON.parseObject(sourceAsString, SkuEsModel.class);
                if (!StringUtils.isEmpty(param.getKeyword())) {
                    HighlightField skuTitle = hit.getHighlightFields().get("skuTitle");
                    String string = skuTitle.getFragments()[0].string();
                    esModel.setSkuTitle(string);
                }
                esModels.add(esModel);
            }
        }
        result.setProducts(esModels);

        //2.当前所有的山沟i你涉及到的所有属性的信息
        List<SearchResult.AttrVo> attrVos = new ArrayList<>();
        ParsedNested attr_agg = response.getAggregations().get("attr_agg");
        List<? extends Terms.Bucket> attr_id_agg = ((ParsedLongTerms) attr_agg.getAggregations().get("attr_id_agg")).getBuckets();
        for (Terms.Bucket bucket : attr_id_agg) {
            SearchResult.AttrVo attrVo = new SearchResult.AttrVo();
            long attrId = bucket.getKeyAsNumber().longValue();
            attrVo.setAttrId(attrId);
            String attr_name = ((ParsedStringTerms) bucket.getAggregations().get("attr_name_agg")).getBuckets().get(0).getKeyAsString();
            attrVo.setAttrName(attr_name);
//            List<String> attrValues = new ArrayList<>();
//            List<? extends Terms.Bucket> attr_value_agg = ((ParsedStringTerms) bucket.getAggregations().get("attr_value_agg")).getBuckets();
//            for (Terms.Bucket bucket1 : attr_value_agg) {
//                String attr_value = bucket1.getKeyAsString();
//                attrValues.add(attr_value);
//            }
//            attrVo.setAttrValue(attrValues);
            List<String> attr_value_agg = ((ParsedStringTerms) bucket.getAggregations().get("attr_value_agg")).getBuckets().stream().map(item -> {
                return item.getKeyAsString();
            }).collect(Collectors.toList());
            attrVo.setAttrValue(attr_value_agg);
            attrVos.add(attrVo);
        }
        result.setAttrs(attrVos);

        //3.当前所有商品设计到的所有品牌信息
        List<SearchResult.BrandVo> brandVos = new ArrayList<>();
        ParsedLongTerms brand_agg = response.getAggregations().get("brand_agg");
        for (Terms.Bucket bucket : brand_agg.getBuckets()) {
            SearchResult.BrandVo brandVo = new SearchResult.BrandVo();
            //得到品牌的id
            long brandId = bucket.getKeyAsNumber().longValue();
            //得到品牌的名字
            String brand_name_agg= ((ParsedStringTerms) bucket.getAggregations().get("brand_name_agg")).getBuckets().get(0).getKeyAsString();
            //得到品牌的图片
            String brand_img_agg= ((ParsedStringTerms) bucket.getAggregations().get("brand_img_agg")).getBuckets().get(0).getKeyAsString();
            brandVo.setBrandId(brandId);
            brandVo.setBrandName(brand_name_agg);
            brandVo.setBrandImg(brand_img_agg);
            brandVos.add(brandVo);
        }
        result.setBrands(brandVos);

        //4.当前所有的商品涉及到的所有分类信息
        ParsedLongTerms catalog_agg = response.getAggregations().get("catalog_agg");
        List<SearchResult.catalogVo> catalogVos = new ArrayList<>();
        List<? extends Terms.Bucket> buckets = catalog_agg.getBuckets();
        for (Terms.Bucket bucket : buckets) {
            SearchResult.catalogVo catalogVo = new SearchResult.catalogVo();
            String keyAsString = bucket.getKeyAsString();
            catalogVo.setCatalogId(Long.parseLong(keyAsString));
            //获取分类名字
            ParsedStringTerms catalog_name_agg = bucket.getAggregations().get("catalog_name_agg");
            String catalog_name = catalog_name_agg.getBuckets().get(0).getKeyAsString();
            catalogVo.setCatlogName(catalog_name);
            catalogVos.add(catalogVo);
        }
        result.setCatalogs(catalogVos);

        //5.分页信息-页码
        result.setPageNum(param.getPageNum());
        //5.分页信息-总记录数
        long total = hits.getTotalHits().value;
        result.setTotal(total);
        //5.分页信息-总页码
        int totalPages = (int) total % EsConstant.PROCUT_PAGESIZE == 0 ? (int)total/EsConstant.PROCUT_PAGESIZE:(int)total/EsConstant.PROCUT_PAGESIZE+1;
        result.setTotalPages(totalPages);

        List<Integer> pageNavs = new ArrayList<>();
        for(int i=1;i<=totalPages;i++){
            pageNavs.add(i);
        }
        result.setPageNavs(pageNavs);

        //6.构建面包屑导航功能
        if(param.getAttrs()!=null&&param.getAttrs().size()>0){
            List<SearchResult.NavVo> collect = param.getAttrs().stream().map(attr -> {
                SearchResult.NavVo navVo = new SearchResult.NavVo();
                String[] s = attr.split("_");
                navVo.setNavValue(s[1]);
                result.getAttrIds().add(Long.parseLong(s[0]));
                R r = productFeignService.attrInfo(Long.parseLong(s[0]));
                if (r.getCode() == 0) {
                    AttrResponseVo data = r.getData("attr", new TypeReference<AttrResponseVo>() {
                    });
                    navVo.setNavName(data.getAttrName());
                }else {
                    navVo.setNavName(s[0]);
                }
                String replcace = replaceQueryString(param, attr,"attrs");
                navVo.setLink("http://search.gulimall.com/list.html?"+replcace);
                return navVo;
            }).collect(Collectors.toList());

            result.setNavs(collect);
        }
        //品牌分类
        if (param.getBrandId()!=null&& param.getBrandId().size()>0) {
            List<SearchResult.NavVo> navs = result.getNavs();
            SearchResult.NavVo navVo = new SearchResult.NavVo();
            navVo.setNavName("品牌");
            R r = productFeignService.brandsInfo(param.getBrandId());
            if (r.getCode()==0) {
                List<BrandVo> brand = r.getData("brand", new TypeReference<List<BrandVo>>() {
                });
                StringBuffer buffer = new StringBuffer();
                String replcace ="";
                for (BrandVo brandVo : brand) {
                    buffer.append(brandVo.getBrandName());
                    replcace = replaceQueryString(param, brandVo.getBrandId().toString(),"brandId");
                }
                navVo.setNavValue(buffer.toString());
                navVo.setLink("http://search.gulimall.com/list.html?"+replcace);
            }
            navs.add(navVo);
        }

        return result;
    }

    private String replaceQueryString(SearchParam param, String value,String key) {
        String encode=null;
        try {
            encode= URLEncoder.encode(value,"UTF-8");
            encode=encode.replace("+","%20");//浏览器对空格编码和Java的不一样
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return param.get_queryString().replace("&"+key+"="+encode,"");
    }

    //    准备索引请求
    private SearchRequest buildSearchRequest(SearchParam param) {
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();//构建DSL语句
        //1.构建bool-query
        BoolQueryBuilder boolQuery = QueryBuilders.boolQuery();
        //1.1must-模糊匹配
        if (!StringUtils.isEmpty(param.getKeyword())) {
            boolQuery.must(QueryBuilders.matchQuery("skuTitle",param.getKeyword()));
        }
        //1.2 bool-filter 按照三级分类id查询
        if (param.getCatalog3Id()!=null) {
            boolQuery.filter(QueryBuilders.termQuery("catalogId",param.getCatalog3Id()));
        }
        //1.2 bool-filter 按照品牌id查询
        if (param.getBrandId()!=null&&param.getBrandId().size()>0) {
            boolQuery.filter(QueryBuilders.termsQuery("brandId",param.getBrandId()));
        }
        //1.2 bool-filter 按照所有的指定的属性进行查询
        if (param.getAttrs()!=null&&param.getAttrs().size()>0) {
            for (String attr : param.getAttrs()) {
                BoolQueryBuilder nestedbollQuery = QueryBuilders.boolQuery();
                //attr =1_5寸:8寸
                String[] s = attr.split("_");
                String attrId = s[0];//检索的属性id
                String[] attrValues = s[1].split(":");//这个属性的检索用的值
                nestedbollQuery.must(QueryBuilders.termQuery("attrs.attrId",attrId));
                nestedbollQuery.must(QueryBuilders.termsQuery("attrs.attrValue",attrValues));
                NestedQueryBuilder nestedQuery = QueryBuilders.nestedQuery("attrs", nestedbollQuery, ScoreMode.None);
                boolQuery.filter(nestedQuery);
            }
        }
        //1.2 bool-filter 按照库存是否有进行查询
        if (param.getHasStock()!=null) {
            boolQuery.filter(QueryBuilders.termQuery("hasStock",param.getHasStock()==1));
        }

        //1.2 bool-filter 按照价格区间
        if (!StringUtils.isEmpty(param.getSkuPrice())) {
            RangeQueryBuilder rangeQuery = QueryBuilders.rangeQuery("skuPrice");
            String[] s = param.getSkuPrice().split("_");
            if (s.length ==2) {
                rangeQuery.gte(s[0]).lte(s[1]);
            } else if(s.length==1){
                if (param.getSkuPrice().startsWith("_")){
                    rangeQuery.lte(s[0]);
                }
                if (param.getSkuPrice().endsWith("_")){
                    rangeQuery.gte(s[0]);
                }
            }
            boolQuery.filter(rangeQuery);
        }
        sourceBuilder.query(boolQuery);

        //2.1排序
        if (!StringUtils.isEmpty(param.getSort())) {
            String sort = param.getSort();
            //sort=hotScore_asc/desc
            String[] s = sort.split("_");
            SortOrder order = s[1].equalsIgnoreCase("asc") ? SortOrder.ASC : SortOrder.DESC;
            sourceBuilder.sort(s[0],order);
        }

        //2.2分页
        sourceBuilder.from((param.getPageNum()-1)*EsConstant.PROCUT_PAGESIZE);
        sourceBuilder.size(EsConstant.PROCUT_PAGESIZE);

        //2.3高亮显示
        if (!StringUtils.isEmpty(param.getKeyword())) {
            HighlightBuilder builder = new HighlightBuilder();
            builder.field("skuTitle");
            builder.preTags("<b style ='color:red'>");
            builder.postTags("</b>");
            sourceBuilder.highlighter(builder);
        }
        //聚合查询
        //1.1品牌聚合
        TermsAggregationBuilder brand_agg = AggregationBuilders.terms("brand_agg");
        brand_agg.field("brandId").size(50);
        brand_agg.subAggregation(AggregationBuilders.terms("brand_name_agg").field("brandName").size(1));
        brand_agg.subAggregation(AggregationBuilders.terms("brand_img_agg").field("brandImg").size(1));
        sourceBuilder.aggregation(brand_agg);
        //3.2分类聚合
        TermsAggregationBuilder catalog_agg = AggregationBuilders.terms("catalog_agg").field("catalogId").size(20);
        catalog_agg.subAggregation(AggregationBuilders.terms("catalog_name_agg").field("catalogName").size(1));
        sourceBuilder.aggregation(catalog_agg);
        //属性聚合
        NestedAggregationBuilder attr_agg = AggregationBuilders.nested("attr_agg", "attrs");
        TermsAggregationBuilder attr_id_agg = AggregationBuilders.terms("attr_id_agg").field("attrs.attrId");
        attr_id_agg.subAggregation(AggregationBuilders.terms("attr_name_agg").field("attrs.attrName").size(1));
        attr_id_agg.subAggregation(AggregationBuilders.terms("attr_value_agg").field("attrs.attrValue").size(50));

        attr_agg.subAggregation(attr_id_agg);
        sourceBuilder.aggregation(attr_agg);


        String s = sourceBuilder.toString();
        System.out.println("des++"+s);
        SearchRequest searchRequest= new SearchRequest(new String[]{EsConstant.PROCUT_INDEX}, sourceBuilder);
        return searchRequest;
    }

























}
